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IGeom3DCurve::PrepByPoint
Description
This method allows you to find the foot of the perpendicular from a given point to the curve, the tangent to and curvature of the curve at that point. If a Guess parameter value is supplied, the perpendicular found is the one nearest to the supplied parameter position, otherwise it is the one at which the curve is nearest to the given point.
Syntax
ResultArray = PrepByPoint( Point, Guess );
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Input: (Variant) Point |
Variant that contains a double array of coordinates of a given point. |
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Input: (Double) Guess |
Parameter on a curve defining the nearest area to a perpendicular from point. |
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Return: (Variant) ResultArray |
Variant that contains a double array of 9 elements consists of: ResultArray(0)-ResultArray(2) - The perpendicular's foot point coordinates; ResultArray(3)-ResultArray(5) - The tangent to curve in that point; ResultArray(6)-ResultArray(8) - The curvature of curve in that point. |
Note
All coordinates are given relative to the model's main UCS.
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